skills.rest
brunoborges
brunoborgesCOMMUNITY
Explore all skills by this author →
Website𝕏@brunoborgesGitHub

java-21-to-25

Upgrade Java projects from JDK 21 to JDK 25 with language and API changes.

Updated Apr 6, 2026
Search Tags:#migration#java#upgrade#build-tools#virtual-threads#jdk25
One-click install
npx skills add https://github.com/brunoborges/gh-appmod --skill java-21-to-25
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: java-21-to-25
Source: https://github.com/brunoborges/gh-appmod/tree/main/skills/java-21-to-25
Command: npx skills add https://github.com/brunoborges/gh-appmod --skill java-21-to-25

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Streamline upgrading Java projects from JDK 21 to JDK 25 by outlining migration patterns, feature adoption, and tooling changes to reduce risk and effort.

Core Features & Use Cases

  • Language feature adoption: unnamed variables, flexible constructor bodies, module imports, and compact source files
  • API modernization: Stream Gatherers, Class-File API, Scoped Values, Foreign Function & Memory API, and KDF API
  • Migration strategy: phased plan covering build updates, dependency migrations, testing, and deployment readiness

Quick Start

Upgrade your Java project from JDK 21 to JDK 25 following the guided steps to update compiler settings, remove Security Manager usage, and adopt new language and API features.

Frequently Asked Questions about java-21-to-25

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I upgrade my Java project from JDK 21 to JDK 25?▼

Upgrade Java projects from JDK 21 to 25 by updating compiler configurations, migrating dependencies, and adopting new language features like unnamed variables and flexible constructor bodies through a phased deployment plan.

What breaking changes require migration when upgrading to Java 25?▼

Upgrading to Java 25 requires removing Security Manager usage, migrating sun.misc.Unsafe usage, and transitioning JNI to the Foreign Function & Memory API to ensure application compatibility.

How do I migrate sun.misc.Unsafe and JNI code for Java 25?▼

Migrate sun.misc.Unsafe and JNI code by adopting the Foreign Function & Memory API, replacing native access patterns with modern, supported Java APIs to maintain stability and performance.

What new Java language features can I adopt after upgrading to JDK 25?▼

After upgrading to JDK 25, adopt new language features including unnamed variables, flexible constructor bodies, module imports, and compact source files to modernize your codebase.

Does upgrading to Java 25 require updating build tools and testing frameworks?▼

Upgrading to Java 25 requires updating build tool compiler settings and migrating testing frameworks to ensure dependency compatibility and validate deployment readiness across modern Java stacks.

What are Scoped Values and Stream Gatherers in the Java 25 upgrade?▼

Scoped Values and Stream Gatherers are API modernizations available in Java 25, allowing developers to replace legacy patterns and enhance data processing pipelines during the migration.

Related Skills

Explore More Software Engineering Skills→
pingqLINpingqLIN

java-21-to-java-25-upgrade

Guide Java project upgrades from JDK 21 to JDK 25.

Community
Intermediate
kreuzberg-devkreuzberg-dev
836

java-bindings-patterns

Implement Java 25 FFM API bindings for a Rust core with JUnit 5 tests.

Official
Advanced
dorriodorrio

ln-626-dead-code-auditor

Audit codebases for unreachable code, unused imports, variables, functions, and deprecated patterns.

Community
Intermediate
brunoborgesbrunoborges

java-17-to-21

Upgrades Java projects from JDK 17 to JDK 21 with migration planning and feature adoption guidance for Maven and Gradle builds.

Community
Advanced